= Code Provenance Review =

This purpose of this document is to fulfill one of the requirements of the OSGeo Incubation process, the [http://wiki.osgeo.org/wiki/Code_Provenance_Review Code Provenance Review].

= Included !Components/Libraries =

PostGIS includes a few files from other projects. There doesn't appear to be any licensing conflicts with the included components.

 * Autoconf - stuff generated by autoconf and some helper macros
   * /autogen.sh - I suspect this is copied from something, but it's almost certainly free or X/MIT-style
   * /macros/* - m4 autoconf macros - all of these are either GPL or public domain (many are from GNU gettext)
 * libtool
   * /libtool
   * /config.rpath - libtool helper - X-style free license from FSF
 * OGC test suite
   * /extras/ogc_test_suite/schema.sql, queries.sql - OGC testing license, references http://www.opengis.org/testing/ which doesn't exist anymore
 * 2010 Tiger geocoder - refers to being taken from Steven Frost's git repository (http://www.snowman.net/git/tiger_geocoder/)
   * /extras/tiger_geocoder/tiger_2010/*
 * install-sh
   * /install-sh - X license from X11R6
 * Shapelib - several files copied form shapelib, possibly modified, under X/MIT License from Frank Warmerdam
   * /loader/dbfopen.c
   * /loader/safileio.c
   * /loader/shapefil.h
   * /loader/shpopen.c
 * Getopt - command line option handling library - public domain from AT&T
   * /loader/getopt.c
   * /loader/getopt.h
 * PG-raster - the PostGIS Raster project merged into PostGIS recently
   * /raster/* - various files in here specify GPL v3 in their headers


= !Copyright/Licensing Issues =

Mloskot did a quick search for "copyright" to start this off: [http://trac.osgeo.org/postgis/attachment/ticket/840/trunk-r6856-copyright-grep.txt ]

 * /autogen.sh - I suspect this is copied from something, but it's almost certainly free or X/MIT-style
 * /config.rpath - libtool helper - X-style free license from FSF
 * /doc/xsl/*.xsl - BSD licensed documentation generation scripts Copyright by Regina Obe
 * /extras/ogc_test_suite/schema.sql, queries.sql - OGC testing license, references http://www.opengis.org/testing/ which doesn't exist anymore
 * /extras/tiger_geocoder/tiger_2010/ - need to check Steve Frost's git repository for any licenses (http://www.snowman.net/git/tiger_geocoder/)
 * /install-sh - X license from X11R6
 * /java/* - java libraries - everything under here is LGPL except for some examples which are GPL
 * /loader/dbfopen.c, safileio.c, shapefil.h, shpopen.c - derivatives of ShapeLib under X/MIT License from Frank Warmerdam
 * /loader/getopt.* - public domain from AT&T
 * /macros/* - m4 autoconf macros - all of these are either GPL or public domain (many are from GNU gettext)
 * /raster/* - various files in here specify GPL v3 in their headers

This [http://www.softwarefreedom.org/resources/2007/gpl-non-gpl-collaboration.html document] from softwarefreedom.org explains how it is acceptable to include code with a "permissive" licence in a GPL-licensed project. This includes the BSD and X/MIT licenses, which according to this review are the only other licenses used by code included in the PostGIS project.